Introduce const Trait (always-const trait bounds)

2023-12-18 17:55:55 +01:00
parent 2fe50cd72c
commit 3eb48a35c8
69 changed files with 505 additions and 223 deletions
--- a/compiler/rustc_hir/src/hir.rs
+++ b/compiler/rustc_hir/src/hir.rs
@@ -420,9 +420,15 @@ pub enum GenericArgsParentheses {
 /// A modifier on a trait bound.
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, HashStable_Generic)]
 pub enum TraitBoundModifier {
+    /// `Type: Trait`
    None,
+    /// `Type: !Trait`
    Negative,
+    /// `Type: ?Trait`
    Maybe,
+    /// `Type: const Trait`
+    Const,
+    /// `Type: ~const Trait`
    MaybeConst,
 }